Me and my girlfriend participated in some sexual activity 3 days ago. We were not wearing a condom but she is on birth control. My penis was rubbing against her vagina and I did not think it inserted but she thought it might ve for a second or two. She has never had sex so she is unsure. I did not ejaculate but I know there is a possibility for pre cum and that can cause pregnancy. Yesterday she felt off and on cramping throughout the day and felt nauseous for periods of time as well. Today she felt better but woke up and was kindof dizzy and has had a headache all day. She felt like her stomach hurt later in the day. We are scared and do not know what to do. We have researched many things and aren t sure what to do. I know the plan b pill is an option but I just do not understand how she could even have a possibility of becoming pregnant if we didn t even completely have sex (I don t think we did at all), I did not ejaculate, and she is on birth control. Please help us with some advice. Thank you.